Method for remotely reading electric meters

ABSTRACT

A method of remotely reading electricity consumption data in a system that includes isolated electricity meters and a server for processing consumption data. Each isolated electricity meter being provided with communications means for transmitting the consumption data specific thereto over a communications network of the wired or mobile telephone network type. The consumption data from a plurality of isolated meters is initially transmitted over the wired or mobile telephone type communications network to a unit that collects and stores temporarily the consumption data from a plurality of isolated meters, and the consumption data stored temporarily by the unit is subsequently sent in grouped manner to the server. The invention relates to energy distribution networks.

The invention relates to remotely establishing an electricityconsumption data statement in a system that includes a server forprocessing consumption data, which server is in communication withelectricity meters that transmit said data.

BACKGROUND OF THE INVENTION

Drawing up a statement for an electricity meter consists in recoveringdata representative of electricity consumption as measured by the meter,e.g. for the purpose of establishing a bill for the consumption. Thisoperation may be performed by a technician who notes the consumptiondata displayed by each meter, but several methods are known for readingmeters remotely that make it possible to avoid using such a technician.

Each meter is then fitted with a modem in order to set up a connectionwith a consumption data processing server in order to transferconsumption data from each meter to the server.

The connection used is generally a data transmission connection makinguse in particular of a wired or mobile telephone type network, whichdata may be transmitted to the telephone network over various channels.

The data may be transmitted via a channel of a public switched telephonenetwork (PSTN), i.e. over a wired connection using a modem of the typeused to connect a computer to an Internet access supplier, generallyreferred to as a PSTN modem.

The data may also be transmitted over a GMS/Data channel, i.e. via awireless connection using a modem that is similar to those fitted tomobile telephones of the GMS type (global system for mobilecommunication). Data transmission then takes place in a manner analogousto transmitting text messages in the short message service (SMS) format.

The data may also be transmitted to the telephone network over a globalpacket radio service (GPRS) channel, i.e. a connection set up by a highdata rate wireless modem of the GPRS type.

Concretely, the consumption data from each meter is transferred meter bymeter to the server, since each meter needs to set up a call with theserver in order to transfer its data.

In practice, the large number of telephone connections needed forreading all of the isolated meters in a set of meters mobilizes a largefraction of the resources of the server. The resources available forprocessing the data proper are thus reduced, thereby penalizing the timerequired for processing all of the consumption data.

OBJECT OF THE INVENTION

The object of the invention is to provide a solution for remedying theabove drawbacks.

SUMMARY OF THE INVENTION

To this end, the invention provides a method of remotely readingelectricity consumption data in a system that includes isolatedelectricity meters and a server for processing consumption data fromeach isolated meter, each isolated electricity meter being provided withcommunications means for transmitting the consumption data specificthereto over a communications network of the wired or mobile telephonenetwork type, wherein the consumption data from a plurality of isolatedmeters is initially transmitted over the wired or mobile telephone typecommunications network to a unit that collects and stores temporarilythe consumption data from a plurality of isolated meters, and whereinthe consumption data stored temporarily by the unit is subsequently sentin grouped manner to the server.

With this solution, consumption data coming from isolated meters is sentto the server in grouped manner, such that the server no longer needs toset up telephone connections. The server thus has more resourcesavailable for processing the data proper.

The invention also provides a method as defined above, in which theconsumption data from a plurality of distinct isolated meters isconverted into a common format prior to being sent to the server.

The server may thus be configured to process input data in a singleformat, thereby contributing to improving the performance of the serverconcerning data processing.

The invention also provides a system for implementing the above method,in which the server and the collection and temporary storage unit forthe consumption data correspond to distinct computer terminals.

With this architecture, the collection of the data and its processingmay thus be performed by different operators, as often happens inpractice.

The invention also provides a system as defined above, in which the unitfor collection and temporary storage of consumption data comprises aplurality of computer terminals that are interconnected by a localnetwork, and the consumption data from the isolated meters is stored inat least two distinct terminals in redundant manner.

The invention also provides a system as defined above, in which the unitfor collection and temporary storage of consumption data includes acomputer terminal dedicated to transferring data from each isolatedmeter towards the unit.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a diagram of the system in which the invention is implemented.

FIG. 2 is another diagram showing a collection and storage unit of theinvention.

DETAILED DESCRIPTION OF THE INVENTION

The system shown in FIG. 1 comprises a set or three separate metersidentified by 1, 2, and 3 that are physically close to one another. Themeters are united in clusters by being connected to a single terrainconcentrator referenced 4, via a power line carrier current datatransmission connection referenced 6.

The terrain concentrator 4 is suitable for bidirectional data exchangewith each of the three meters 1, 2, and 3 so as to interrogate them inturn in order to recover consumption data from each of the meters. Theterrain concentrator 4 is fitted with a modem 7 for transmitting theconsumption data of these various meters 1, 2, and 3 in grouped mannerto a data processor server, given reference 8.

The modem 7 is of the GPRS type for wireless data transmission in thenform of packets via a data transmission connection making use inparticular of a wired and/or mobile telephone type communicationsnetwork given reference 9.

The network 9 is a wired or mobile telephone network serving inparticular to transfer digital data by wire or wirelessly. Data may betransferred to the network 9 by wire via a PSTN or other type of modem.Data may also be transferred to the network 9 wirelessly, via a GSM/Datatype modem or indeed by GPRS.

In the present example, the modem 7 transmits data into the network 9 byGPRS, represented symbolically by a dashed line referenced 10. Theconnection over which data is transmitted from the modem 7 to the server8 then travels via an Ethernet connection referenced 11, over which thedata that has been conveyed by the telephone network 9 is delivered tothe server 8.

When the data representative of the consumption of each of the meters 1to 3 is received by the server 8, it is broken down and processedthereby, e.g. in order to draw up corresponding consumption statements.

This system also includes three isolated meters 12, 13, and 14. Thefirst isolated meter 12 is fitted with a GPRS modem belongingspecifically thereto, identified by reference 16 or transmitting data tothe telephone network 9 via a GPRS channel referenced 17, which datarelates to consumption by that portion of the electricity network thatis metered by this meter.

The second isolated meter 13 is also fitted with its own modem, givenreference 18. This modem is of the GSM/Data type for transmitting datato the telephone network 9 over a GSM/Data channel referenced 19, whichdata relates to the consumption of the portion of the electricitynetwork it meters. The third isolated meter 14 is fitted with a PSTNtype modem given reference 21, in order to transmit data to thetelephone network 9 via a PSTN channel given reference 22, which datarelates to the consumption of that portion of the electricity networkthat is metered by this meter.

Thus, via the communications means as constituted by the modems 16, 18,and 21, the three isolated meters 12, 13, and 14 transmit thecorresponding consumption data in individual manner to the telephonenetwork 9.

The data transmitted by each of these three meters 12, 13, and 14 isconveyed over the telephone network 9 so as to be subsequentlytransferred via a connection 24, possibly of the Ethernet type, to aunit 23 for collection and temporary storage of the data, saidconnection 24 connecting the unit 23 to the telephone network 9.

Thus, the transmission line over which the data from each isolated meter12, 13, 14 is transferred passes in succession via: the telephonenetwork 9, by means of a PSTN, GMS/Data, or indeed GPRS channel; thenthe wired connection 24 so as to reach the unit 23 for collection andtemporary storage of the data. The consumption data from the variousisolated meters such as the meters 12, 13, and 14 is then sent ingrouped manner to the server 8 via another wired connection 26connecting the unit 23 to the server 8.

The unit 23 thus collects the consumption data coming from each isolatedmeter 12, 13, 14 in order to store it prior to sending it in groupedmanner to the server 8. As shown diagrammatically in FIG. 1, the server8 may be connected for this purpose to the unit 23 via a wiredconnection 26 such as an Ethernet connection.

Since the server 8 receives the consumption data from the isolatedmeters 12 to 14 in grouped manner, it processes that data in the samemanner as if it were receiving consumption data coming from metersunited in a cluster in order to establish consumption statements.

The temporary data collection and storage unit 23 constitutes a virtualconcentrator given that it presents the server 8 with data that isgrouped in the same manner as if it had been aggregated by the terrainconcentrator situated upstream from the telephone network 9, even thoughit is in fact aggregated downstream from the telephone network 9.

The unit 23 is shown diagrammatically in FIG. 2. It comprises aplurality of computer terminals connected together by a local network28, and also connected to the telephone network 9 and to the server 8via wired connections 24 and 26.

More particularly, the unit 23 has a telephone call terminal 29 suitablefor connecting to each of the isolated meters 12, 13, 14 via thetelephone network 9 in order to recover the consumption data from saidmeters.

Once the data from a meter has been received in the terminal 29, it isforwarded to a second terminal, given reference 31, that constitutes adata distributor. The distributor 31 sends the received consumption datato a plurality of other terminals, here referenced 32 and 33, thatconstitute redundant storage terminals.

The storage terminals 32 and 33 are connected to a routing terminal 34so as to provide the server 8 with the consumption data they have storedtemporarily.

In practice, once the consumption data from a sufficient quantity ofisolated meters has been stored in the terminals 32 and 33 of the unit23, the data is transmitted to the server 8 by the routing terminal 34.

This transmission may take place in packets, in application of thecommunications protocol used between the unit 23 and the server 8, butwith the consumption data from a plurality of isolated meters beingtransferred in grouped manner in a single transmission.

It should be observed that in general, bidirectional communication isestablished between each isolated meter 12 and 13 and the unit 23: theunit 23 interrogates each isolated meter in succession in order torequest the transmission of consumption data, with the data from eachisolated meter being collected in entirely autonomous manner by the unit23. Analogously, software updates for the system in each isolated metermay be transmitted by the unit 23 for installation in the meters.

In the example shown in the figures, the unit 23 is embodied by computerterminals that are distinct from the terminal running the server.However the unit 23 may also be constituted merely by a softwareapplication that is distinct from the application constituting theserver 8. The application constituting the unit 23 and the server 8 maythus be run on a single computer terminal.

The invention provides the following advantages in particular:

It enables isolated electricity meters to be managed using a server thatis dedicated to processing information coming from meters united inclusters, without there being any need to modify the server.

So far as the server is concerned, there is no difference in how ithandles meters that are united in clusters and meters that are isolated,since the data coming from the terrain concentrator 4 and the datacoming from the unit 23 is all addressed to the server 8 in the sameformat. The unit 23 thus provides the same logical interface as theterrain concentrator 4.

The unit 23 thus serves to reduce the load on the server, since theserver no longer has to handle communications with each isolated meter,nor does it need to handle a diary telling it when isolated meters needto be read.

The resources needed for operating the server are thus reduced andserver optimization is made significantly easier by the fact that itneeds to handle only one format input data.

Because of the redundancy of the data storage terminals 32 and 33, theconsumption data that has been collected in the unit 23 will not belost.

1. A method of remotely reading electricity consumption data in a systemthat includes isolated electricity meters and a server for processingconsumption data from each isolated meter, each isolated electricitymeter being provided with communications means for transmitting theconsumption data specific thereto over a communications network of thewired or mobile telephone network type, wherein the consumption datafrom a plurality of isolated meters is initially transmitted over thewired or mobile telephone type communications network to a unit thatcollects and stores temporarily the consumption data from a plurality ofisolated meters, and wherein the consumption data stored temporarily bythe unit is subsequently sent in grouped manner to the server.
 2. Themethod according to claim 1, wherein the consumption data from aplurality of distinct isolated meters is converted into a common formatprior to being sent to the server.
 3. A system for implementing themethod according to claim 1, wherein the server and the data collectionand temporary storage unit for the consumption data correspond todistinct computer terminals.
 4. The system according to claim 3, whereinthe unit for collection and temporary storage of consumption datacomprises a plurality of computer terminals that are interconnected by alocal network, and wherein the consumption data from the isolated metersis stored in at least two distinct terminals in redundant manner.
 5. Thesystem according to claim 4, wherein the unit for collection andtemporary storage of consumption data includes a computer terminaldedicated to transferring data from each isolated meter towards theunit.